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<div class="content" data-ice="content"><h1 data-ice="title">src/modules/loader.js</h1>
<pre class="source-code line-number"><code class="prettyprint linenums" data-ice="content">import Dom from &apos;../dom&apos;;
import Types from &apos;../types&apos;;
var global = window;
export class Loader{
/**
* Loading message/spinner
* @param {Object} tf TableFilter instance
*/
constructor(tf){
// TableFilter configuration
var f = tf.config();
//id of container element
this.loaderTgtId = f.loader_target_id || null;
//div containing loader
this.loaderDiv = null;
//defines loader text
this.loaderText = f.loader_text || &apos;Loading...&apos;;
//defines loader innerHtml
this.loaderHtml = f.loader_html || null;
//defines css class for loader div
this.loaderCssClass = f.loader_css_class || &apos;loader&apos;;
//delay for hiding loader
this.loaderCloseDelay = 200;
//callback function before loader is displayed
this.onShowLoader = Types.isFn(f.on_show_loader) ?
f.on_show_loader : null;
//callback function after loader is closed
this.onHideLoader = Types.isFn(f.on_hide_loader) ?
f.on_hide_loader : null;
//loader div
this.prfxLoader = &apos;load_&apos;;
this.tf = tf;
var containerDiv = Dom.create(&apos;div&apos;, [&apos;id&apos;, this.prfxLoader+tf.id]);
containerDiv.className = this.loaderCssClass;
var targetEl = !this.loaderTgtId ?
tf.tbl.parentNode : Dom.id(this.loaderTgtId);
if(!this.loaderTgtId){
targetEl.insertBefore(containerDiv, tf.tbl);
} else {
targetEl.appendChild(containerDiv);
}
this.loaderDiv = Dom.id(this.prfxLoader+tf.id);
if(!this.loaderHtml){
this.loaderDiv.appendChild(Dom.text(this.loaderText));
} else {
this.loaderDiv.innerHTML = this.loaderHtml;
}
}
show(p) {
if(!this.tf.loader || !this.loaderDiv ||
this.loaderDiv.style.display===p){
return;
}
var displayLoader = () =&gt; {
if(!this.loaderDiv){
return;
}
if(this.onShowLoader &amp;&amp; p!==&apos;none&apos;){
this.onShowLoader.call(null, this);
}
this.loaderDiv.style.display = p;
if(this.onHideLoader &amp;&amp; p===&apos;none&apos;){
this.onHideLoader.call(null, this);
}
};
var t = p===&apos;none&apos; ? this.loaderCloseDelay : 1;
global.setTimeout(displayLoader, t);
}
destroy(){
if(!this.loaderDiv){
return;
}
var tf = this.tf,
targetEl = !this.loaderTgtId ?
(tf.gridLayout ?
tf.feature(&apos;gridLayout&apos;).tblCont : tf.tbl.parentNode):
Dom.id(this.loaderTgtId);
targetEl.removeChild(this.loaderDiv);
this.loaderDiv = null;
}
}
</code></pre>
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